* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


body {
    font-family: 'Lato', sans-serif;
    font-family: 'Open Sans', sans-serif;
    font-family: 'Raleway', sans-serif;
}

.header {
    min-height: 74px;
    padding-left: 5vw;
    padding-right: 5vw;
    padding-top: 4.3vh;
    padding-bottom: 1.5vh;
    background-color: #222;

}

.complex_header {
    margin-top: -2%;
    display: inline-flex;
    gap: 2%

}

.container {
    width: 1140px;
    margin: auto;
    max-width: 100%; /* be very attentive with that propeerty*/

}

.basic_main {
    background: linear-gradient(rgb(255 255 255 / 55%), rgb(151 142 142 / 45%)),
    url(../images/books-stacked-in-right-side-of-image.webp);

    min-height: 100%;
    background-size: cover;

    opacity: 0.8;
}

.header_h1 {
    padding-top: 4%;
    color: #011d58;;
    text-align: center;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5)
}

.header_h3 {
    padding-top: 1%;
    color: #164dc4;;
    text-align: center;
    text-shadow: 2px 2px 4px rgba(8, 82, 72, 0.5);
    text-decoration: none;

}

.flex1 {
    display: flex;
    justify-content: center;
}

.flex2 {
    display: flex;
    justify-content: space-around;
}

.edit_tutor_btn {
    display: flex;
    justify-items: center;
}

.buttons_area {
    margin-top: 2%;

}


.test_btn {
    margin-top: 2%;

}


.flex {
    display: flex;
    justify-content: space-between;
}

.main1 {
    margin-bottom: 5%;
}

.main2 {
    margin-bottom: 5%;
}

.main2_other {
    margin-bottom: -5%;
}

.main3_header {
    text-align: center;
}

.main3 {
    display: flex;
    align-content: center;
    margin-bottom: 10%;

}

.assign_form {

    margin-top: 2%;
    display: flex;
    justify-content: center;

}

.footer {
    margin-top: 20%;
    align-items: center;
}

.footer_other {
    margin-top: 30%;
    align-items: center;
}

.logout {
    text-align: center;
    padding-bottom: 4%;

}

.text_field {
    margin-bottom: 1rem;
}

.text_field_label {
    display: block;
    margin-bottom: 0.25rem;
}

.button_place {
    display: flex;
    justify-content: center;
}

.tutor_edition {
    width: 40%;
}


.text_field_input {
    display: block;
    width: 100%;
    height: calc(2.25rem + 2px);
    padding: 0.375rem 0.75rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #bdbdbd;
    border-radius: 0.25rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.submit_btn {
    display: inline-block;
    box-sizing: border-box;
    padding: 0 25px;
    margin: 0 15px 15px 0;
    outline: none;
    border: 1px solid #0030b6;
    border-radius: 2px;
    height: 45px;
    line-height: 3;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    color: #444;
    background-color: #fff;
    box-shadow: 0 4px 6px rgb(65 132 144 / 10%), 0 1px 3px rgb(0 0 0 / 8%);
    cursor: pointer;
    user-select: none;
    appearance: none;
    touch-action: manipulation;
    vertical-align: top;
    transition: background-color 0.4s, box-shadow 0.2s;
}

.submit_btn:focus-visible::before {
    border: 1px solid #4c51f9;
    outline: none;
}

.submit_btn:hover {
    background: rgba(0, 0, 0, 0);
    color: #3a7999;
    box-shadow: inset 0 0 0 3px #9ab7c5;
}

.submit_btn:active {
    background-color: #0b939c;
}

.submit_btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    transition: all 2s ease;
}

.placeholder-box {
    display: block;
    position: relative;
    margin: 20px 0;
}

.placeholder-box input {
    display: block;
    box-sizing: border-box;
    width: 100%;
    height: 35px;
    line-height: 35px;
    padding: 0 10px;
    font-size: 14px;
    font-weight: 400;
    color: #495057;
    background-color: #fff;
    border: 1px solid #ced4da;
    border-radius: 5px;
}

.placeholder-text {
    display: none;
    width: 100%;
    line-height: 37px;
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    color: #888;
    cursor: text;
    user-select: none;
}

.placeholder-box input:invalid + .placeholder-text {
    display: block;
}

.students_list {
    margin-bottom: -26%;
}


.cellar_footer {
    background-color: #222224;
    height: 79px;
    display: flex;

}

.cell_of_footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;

}

.right_footer_side {
    display: flex;
    justify-content: center;


}

.footer_text {
    color: #FBFBFB;
    font-family: Lato;
    font-size: 16px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
}

.left_footer_side {

    display: flex;
    justify-content: center;

}

.cellar_footer_logos {
    display: flex;
    gap: 7.29px;
}

.footer_cellar_link {
    position: absolute;

}

.logoONE {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;

}

